How to play Sudoku multiplayer — free online shared sudoku race
One shared sudoku. First right digit claims the cell.
- Players
- 1–4 (solo too)
- Length
- ~8 min
- Type
- Numbers
- Price
- Free
This is sudoku as a race. The whole room solves one 6×6 grid together, and the first player to put the right digit in a cell claims it in their colour and banks the points.
Because it's a shared board, every cell somebody claims makes the remaining cells easier for everyone — including whoever is behind. That's what stops one fast solver from simply running away with it.
Free, no app and no sign-up to join — players hop in with a 4-letter code on their own phone.
How to play Sudoku
The host picks the number of puzzles
Three is the default, and the rounds ramp from easy to fiendish. One is a quick game; five is a full session.
Everyone gets the same grid
A 6×6 sudoku with some digits printed. Every player sees the same board and the same live progress.
Tap an open cell, then a digit
The first correct digit locks the cell in that player's colour and banks the points immediately.
Wrong digits cost you
A wrong answer costs 50 points and benches you for a beat, so spamming digits is actively bad.
The grid fills
The round ends when the board is complete or the clock runs out, and the reveal shows who claimed what.
What Sudoku looks like
How scoring works
Each cell you claim banks points, and chains of correct claims build a streak bonus — so a run of confident solves is worth much more than the same number of scattered ones.
A wrong digit costs 50 points and benches you briefly. That penalty is what makes the game about certainty rather than speed alone.
Because the board is shared, the puzzle gets easier as it fills. Falling behind isn't fatal — the claims your opponents make are the constraints you need.
Tips for winning Sudoku
- Only claim what you can prove. The 50-point penalty plus the bench time makes a guess much more expensive than the cell is worth.
- Work the most-constrained rows and boxes. On a 6×6 grid a row with four givens usually has a forced cell somewhere.
- Watch what your opponents claim. Every lock is free information you didn't have to work out.
- Build streaks deliberately — string together cells you're certain about rather than jumping around the board.
Frequently asked questions
How many players do you need?
One to four. Solo it's a pure race against the clock; with a room it's a claim race.
Is it a normal 9×9 sudoku?
No, it's a 6×6 mini grid. That keeps a round to a few minutes, which is what makes it work as a party game.
What happens if I enter a wrong digit?
You lose 50 points and you're benched for a moment. Certainty matters more than speed here.
Is it free?
Yes, free to play and free to host, with no account needed to join.
Free, no app and no sign-up to join — players hop in with a 4-letter code on their own phone.